6-speed automatic transmission

The Hydra-Matic® electronically controlled 6-speed automatic transmission with overdrive is engineered to provide smooth, seamless shifts for Silverado® models equipped with either the Vortec® 5.3L V8 or the Vortec 6.2L V8 engine. This transmission includes a Tow/Haul Mode adjusts the transmission shift pattern to reduce shift cycling, providing increased performance, vehicle control and transmission cooling when towing a heavy trailer or hauling a heavy load.